硅掺杂TiO2纳米管阵列的制备及光电催化活性的研究

通过电化学沉积,在阳极氧化法制备的高度有序TiO2纳米管阵列表面均匀地沉积Si元素.扫描电子显微照片显示Si掺杂的TiO2纳米管垂直于基底定向生长.X射线衍射分析表明,所引入的Si可能掺入到TiO2的晶格中,因而提高了TiO2的热稳定性,抑制了金红石相的生成及晶粒的长大.紫外-可见漫反射分析表明Si掺杂的TiO2纳米管吸收边带发生了明显的蓝移,并且在紫外区的吸收强度明显增强.与未掺杂的TiO2纳米管相比,Si掺杂TiO2纳米管电极的紫外光电化学响应显著提高,其光电流密度是未掺杂的1.48倍.硅掺杂TiO2纳米管阵列光电催化降解五氯酚的动力学常数(1.651h-1)是未掺杂TiO2纳米管电极(0.823h-1)的2.0倍.     

一流实验中心建设的探索与实践

针对新时期实验教学中心在建设中遇到的问题,我校基础化学实验中心始终坚持以学生为本的建设理念,分别从实验教学队伍建设、课程体系建设、教学质量保障机制建设和安全环保制度建设等方面进行了持续不断的探索和尝试,取得了显著的成效,形成了一批对实验教学中心建设具有重要参考价值的成果。基础化学实验中心在2005年被评为"首批国家级实验教学示范中心",2013年被评为"首批国家级虚拟仿真实验教学示范中心"。     

Electrical Characteristics of Pulsed Corona Discharge Plasmas in Chitosan Solution

Pulsed discharge plasma has exhibited active potential to prepare low molecular weight chitosan. In the present study, the viscosity of ehitosan solution was decreased noticeably after treated with pulsed corona discharge plasma. An experimental investigation on electrical characteristics of pulsed corona discharge plasma in chitosan solution was conducted with a view toward getting insight into discharge process. Factors affecting I-V curve, single pulse injec- tion energy and pulse width were studied. Experimental results showed positive effect of pulsed peak voltage on discharge plasma in chitosan solution. Pulse-forming capacitor greatly influenced the discharge form, and 4 nF was observed as a suitable value for efficiently generating stable discharge plasmas. As the electrode distance was larger than 10 ram, it had slight impact on dis- charge plasma due to the excellent conductive-property of chitosan solution. The injection energy significantly increased with air flow rate, while the pulse width hardly changed as the air flow rate increased from 0.5 m^3/h to 1.0 m^3/h. This study is expected to provide reference for promoting the application of pulsed corona discharge plasma to ehitosan solution treatment.     

辛烯-1合成生产技术研究进展

综述了国内外合成生产辛烯-1工艺路线、生产特点,介绍了当前生产辛烯-1技术研究发展状况。     

容器钢板国标修订对重钢的影响及对策

本文分析了容器钢板国标修订后的质量形势与市场走势,并结合重钢面临的问题,提出了对策和建议。     

热分析法在聚烯烃树脂开发中的应用

介绍了多种热分析方法（包括示差扫描量热（DSC）分析、热重（TG）分析、动态热机械分析（DMA））在聚烯烃树脂开发中的应用。采DSC、TG、DMA等方法可以测量聚烯烃树脂的熔点、结晶温度、热分解温度、维卡软化点等,在聚烯烃树脂开发中具有重作用。     

高碳醇桶包装自动计量系统

介绍了100kt／a高碳醇桶包装计量系统,适用于全自动流体动态计量的定量桶包装生产线。系统包括空桶电动辊式运输机、自动装桶机、满桶电动辊式运输机、自动桶压印机、自动桶码堆机、卸料辊式运输机、主电气柜。文中阐述了此系统的结构组成、工作原理、自动控制、特点及应用。